Watch Meghan crack up after Harry hilariously swats away a fly during speech in Dubbo

Prince Harry and Meghan Markle's visit to Dubbo has been a huge success, with thousands of locals gathering to greet the couple during a much-needed downpour.

But with the rain comes the humidity, and with the humidity come the flies.

In one of the best moments so far on the Royal Tour, Prince Harry has playfully swatted flies away as Ruth Sandow from the Royal Flying Doctor Service delivered a speech - much to the amusement of his wife, who erupted into a fit of laughter.

Ms Sandow used the candid moment to add, "The flies are friendly in Dubbo!" as Harry comically tried to keep them away.

The couple delighted fans in Dubbo. (Getty )

The moment was reminiscent of Prince Charles' 70th birthday speech, when Prince Harry was bothered by a bee during a garden party at Buckingham Palace.

Harry tried to swat the insect away, even pausing his speech to say, "Sorry, that bee really got to me!"

Meghan then put her hand to her face to try and stifle her laughter.

The Duke and Duchess of Sussex are in Melbourne today to continue the Royal Tour. So far it has been a busy three days for the couple with crowds gathering everywhere they go.